PYROTECHNIC GENERATOR WITH TWO COMBUSTION CHAMBERS

摘要

The invention relates to a pyrotechnic gas generator for inflating a motor vehicle airbag, the generator comprising at least a pyrotechnic charge (5) in the combustion chamber (C1) adjacent to an initiator (6) is formed by juxtaposing pellets, each presenting a central hole, thus constituting a longitudinal channel (CL); outlet orifices (33) of the inner tube (3) are situated facing the combustion chamber (C2) that contains a charge (5') presenting a shorter duration of combustion than the charge (5) in the combustion chamber (C1); a plenum and filter chamber (T) containing a filter (F) in register with both combustion chambers (C1, C2),- and an outer tube (2) presents orifices (23) for allowing gas to escape to the outside substantially at each end of a cylindrical wall (20).